G.f. A(x) satisfies A(x) = (1 + x*A(x))^4 * C(x), where C(x) is the g.f. of A000108.
A381861
G.f. A(x) satisfies A(x) = (1 + x*A(x))^4 * C(x), where C(x) is the g.f. of A000108.
Terms
- a(0) =1a(1) =5a(2) =32a(3) =231a(4) =1797a(5) =14715a(6) =125064a(7) =1093194a(8) =9766783a(9) =88793815a(10) =818832674a(11) =7640868924a(12) =72014955566a(13) =684551660324
External references
- oeis: A381861